package com.wingy.mydatepickerdialog;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import java.util.Date;
import java.util.Calendar;
import java.util.Locale;
import android.widget.Button;
import android.view.View.OnClickListener;
import android.app.DatePickerDialog;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.Toast;


public class myDatePickerDialog extends AppCompatActivity {

    private TextView showdate;
    private  Button setdate;
    private int year;
    private int month;
    private int day;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        showdate=(TextView)this.findViewById(R.id.showtime);
        setdate=(Button)this.findViewById(R.id.setdate);
        Calendar c=Calendar.getInstance(Locale.CHINA);
        Date mydate=new Date();
        c.setTime(mydate);
        year=c.get(Calendar.YEAR);
        month=c.get(Calendar.MONTH);
        day=c.get(Calendar.DAY_OF_MONTH);
        showdate.setText("当前日期："+year+"-"+(month+1)+"-"+day);

        setdate.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                DatePickerDialog mydatepickerdialog=new DatePickerDialog(myDatePickerDialog.this,Datelistener,year,month,day);
                mydatepickerdialog.show();
            }
        });
    }
    private DatePickerDialog.OnDateSetListener Datelistener=new DatePickerDialog.OnDateSetListener() {
        @Override
        public void onDateSet(DatePicker view, int y, int m, int d) {

            Date current=new Date();
            Date date=new Date();
            date.setYear(y-1900);
            date.setMonth(m);
            date.setDate(d);
            if (date.getTime() <= current.getTime()) {
                year = y;
                month = m;
                day = d;
                updateDate();

            } else {
                Toast.makeText(myDatePickerDialog.this,"设置日期无效",Toast.LENGTH_LONG).show();
            }
        }
        private void updateDate(){
            showdate.setText("当前日期："+year+"-"+(month+1)+"-"+day);
        }
    };
}
